《土生子》逃离主题探析

在残酷的种族歧视的社会环境下,小说《土生子》主人公别格沦为美国社会的局外人并因杀人而锒铛入狱。理查德赖特通过挖掘黑人犯罪的制度根源,塑造了一个为了寻求自身价值而抗争的黑人新形象,揭示了在种族歧视的＂白色恐怖＂的合围中,主人公别格怀着对平等和自由的向往和追求、不堪忍受不公正环境的压抑而逃离的主题。     

论大学教师学术创新力的基础:学术综合交叉能力

学术综合交叉能力是大学教师创新力的重要心理基础。本文从大学教师学术综合交叉能力的必要性、大学教师学术综合交叉能力的内涵以及大学教师学术综合交叉能力提高的策略三方面论述了大学教师创新力的重要基础。大学教师学术综合交叉能力的研究应该引起大学教师学术创新力研究领域的关注。     

研究生学术失范成因与治理路径探微

研究生学术失范现象是个体道德水平、社会制度、文化等环境因素共同作用的结果。从社会学的视角,运用社会失范论和文化结构论对研究生学术失范行为的成因进行了解读。学术失范之根源在于学术伦理失范,治理学术失范需要重塑学术研究精神,营造崇真尚实、自由独立、创新包容的学术氛围与学术风气,通过制度他律和道德自律,重张学术道德,杜绝学术失范。     

致力于解决流动儿童学前教育问题——首届流动儿童学前教育发展论坛综述

2010年12月10-11日,首届流动儿童学前教育发展论坛在北京师范大学隆重召开.来自全国的500多位代表参加了本届论坛. 在<国务院关于当前发展学前教育的若干意见>(国发[2010]41号)等文件明确要求大力发展学前教育的春风中,流动学前儿童的受教育权受到了进一步关注.     

行为疗法与认知行为疗法干预幼儿多动行为的个案研究

本研究采用单一被试A-B-A-B式实验设计,将行为疗法和认知行为疗法相结合,采用差别强化、Time-out和自我指导等方法和策略,对被试在集体教学活动中出现的多动行为进行干预。研究结果表明,差别强化、Time-out和自我指导三种干预方法的结合,对减少幼儿多动行为的效果最为显著。     

教师的组织承诺特点及其影响因素——基于重庆市主城区公办幼儿园的研究

采用问卷法对重庆市主城区公办幼儿园教师的组织承诺特点及其影响因素进行调查研究.结果表明:1.重庆市主城区公办幼儿园教师总体的组织承诺水平偏低,但呈正向积极状态.2.学历、编制和职称对重庆市主城区公办幼儿园教师的组织承诺水平有显著影响,而年龄和教龄对其没有显著影响.3.绝对收入、离园选择、离园损失、升职机会和职称机会对重庆市主城区公办幼儿园教师的组织承诺水平有显著影响,而相对收入对其没有显著影响.4.重庆市主城区公办幼儿园教师组织承诺中的情感承诺、职业承诺和理想承诺这三个维度受离园状况和晋升机会的影响较大.     

偶氮胂Ⅲ光度法测定微量稀土的实验教学改革

对偶氮胂Ⅲ分光光度法测定稀土元素钆进行了条件优化实验,其中控制显色剂用量是提高测定准确度的关键.在显色溶液中加入无水乙醇以及采用双波长光度法可有效提高测定灵敏度.该实验项目已取代传统的光度分析实验,成为实验教学与实际应用相结合的典范.     

论我国高校办学自主权的权力边界——落实我国高校办学自主权的困境与出路

在落实高校办学自主权过程中,我国政府和高校对其权力边界认识模糊,导致权力失衡,使得我国高校办学自主权的落实陷入困境。把握权力边界,以法律手段明确办学自主权的边界,政府在其权力边界内行使行政权力,高校内部形成以学术权力为主导的权力结构,是落实办学自主权的出路所在。     

Extraction of novel features for emotion recognition

Hilbert-Huang transform method has been widely utilized from its inception because of the superiority in varieties of areas. The Hilbert spectrum thus obtained is able to reflect the distribution of the signal energy in a number of scales accurately. In this paper, a novel feature called ECC is proposed via feature extraction of the Hilbert energy spectrum which describes the distribution of the instantaneous energy. The experimental results conspicuously demonstrate that ECC outperforms the traditional short-term average energy. Combination of the ECC with mel frequency cepstral coefficients (MFCC) delineates the distribution of energy in the time domain and frequency domain, and the features of this group achieve a better recognition effect compared with the feature combination of the short-term average energy, pitch and MFCC. Afterwards, further improvements of ECC are developed. TECC is gained by combining ECC with the teager energy operator, and EFCC is obtained by introducing the instantaneous frequency to the energy. In the experiments, seven status of emotion are selected to be recognized and the highest recognition rate 83.57% is achieved within the classification accuracy of boredom reaching 100%. The numerical results indicate that the proposed features ECC, TECC and EFCC can improve the performance of speech emotion recognition substantially.     

Video retargeting using optimized crop-and-scale

Mobile devices are increasingly powerful in multimedia transmitting and browsing. However, the small screen and different aspect ratios of mobile devices lower visual quality while watching images or videos. Video retargeting is aim at fitting an existing video into arbitrary size and aspect ratio. Previous content-aware retargeting methods are mostly high computational cost, which limits their applications on the portable devices with low computation ability. In this paper, a new crop-and-scale approach is presented to adapt video to better suit the target display. We automatically find the optimal parameters of cropping window using the dynamic programming method, and then scale it to fit the target display. The cropping window can smoothly shift during a shot to follow the movement of important objects. The retargeting results using our approach introduce no deformation and jitter effects over the whole video. Experimental results show the success of our approach on adapting a variety of source videos to small display sizes.